give me solution math not explin 14.14. A three-stage evaporator is fed with1.25 kg/s of a liquor which is concentratedfrom 10 to 40 per cent solids by mass. Theheat transfer coefficients may be takenas 3.1, 2.5 and 1.7 kW/m² K, respectively,in each effect. Calculate the steamflow at 170 kN/m² and the temperaturedistribution in the three effects, if:(a) the feed is at 294 K, and(b) the feed is at 355 K.Forward feed is used in each case andthe values of U are the same for the twosystems. The boiling point in the thirdeffect is 325 K and the liquor has noboiling point rise.

Given DataFeed flow rate (ṁₐ): 1.25 kg/s Initial solids concentration (x₁): 10% or 0.1 Final solids…

Answered: 14.14. A three-stage evaporator is fed…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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11. 30 tonnes of ice from and at 0°C is produced in a day of 24 hours by an ammonia refrigerator. The temperature range in the compressor is from 298 K to 258 K. The vapour is dry saturated at the end of compression and expansion valve is used. Assume a co-efficient of performance of 60% of the theoretical and calculate the power in kW required to drive the compressor. Latent heat of ice is 334.72 kJ/kg. Enthalpy Entropy of liquid Entropy of vapour kJ/kg Тетр. K kJ/ kg kJ/ kg K Liquid Vapour 298 100.04 1319.22 0.3473 4.4852 258 -54.56 1304.99 - 2.1338 5.0585 [Ans. 21.59 kW]
3.) An ammonia compressor operates at evaporator pressure of 316.02 kPa and a condenser pressure of 1557 kPa. A twin-cylinder compressor with bore to stroke ratio of 0.85 is to used at 1200 rpm. The actual volumetric efficiency is 92% and compression and mechanical efficiency is 78% and 80% respectively. For a cooling capacity of 25 TR, (a) the sketch the p-h diagram labeling the evaporating and condensing temperature and pressures (b) define the all properties of ammonia taken from saturation table. Determine (c) the quantity of cooling water in the condenser in kg/min if the increase in temperature is 8°C, (d) the bore and stroke expressed in cm and (e) the size of the driving motor in hp. Given: h2 = h at 1557 kPa and s2 = s1 1695 kJ/kg
A steam condenser receives 10 kg per second of steam with an enthalpyof 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of160 KJ/kg, if cooling water passes through the condenser with temperatureincreases from 13 o C to 24 o C. Calculate the cooling water flow rate inkg/sec.
Water is used in a heat exchanger to cool 5 kg/s of air from 400 to 200 C. Calculate the minimum mass flow rate of the water if Twater =10 C.
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In a 14 TR ammonia refrigeration plant, the condensing temperature is 250C and evaporating temperature -100C. The refrigerant ammonia is sub-cooled by 5 0C before passing through the throttle valve. The vapor leaving the evaporator is 0.97 dry. Find: 1. Coefficient of performance: and 2. Power required. Use refrigerant table for properties of ammonia at 250C and -100C.
Example: 100 TR refrigeration capacity of air condition plant using R134a has evaporating and condensing temperature of 0°C and 35°C respectively, the refrigerant enters with degree of super heat of 7°C. Find 1- Dryness fraction of the vapour entering the evaporato. 2- The mass flow rate of refrigerant, and 3- COP of the system
1) In the condenser of the power plant, Ammonia is isobarically condensed to saturated liquid state with 615.2??? and ? = 0.9, the mass flow rate is 4 ?/h. The heat rejected from the condensing ammonia is added to heat water, which is heated from 277K to 281K. Whar is the mass flow rate of water in ?/h 2) A flow of compressed liquid water at 15??? (In an advanced steam power plant), 308K is mixed adiabatically with a liquid-vapor mixture flow at the same pressure with quality of x=0.88 .The resulting mixture is in the saturated liquid state and the total mass flow is 5 ?/???. What is the mass flows of the incoming flows, and the entropy generation rate, and the work loss for the process (with respect to standard environment, ? = 298?)
The air outside is 40 C and 60% r.h. I want torun an air conditioner to cool it to 15 C. The deliver rate should be 1000 m^3/min. What is Q and the rate at which water condenses (if any)?
iii) the exit area of the nozzle. Take Cp = 1.005 kJ/kg-K and R=287 J/kg-K Q.B3. A heat engine operates between two reservoirs at 400°C and 30°C. Half the power produced by the heat engine is used to drive a Carnot heat pump that removes heat from the cold surroundings at 2°C and transfers it to a house maintained at 27°C. The heat engine is absorbing heat at a rate of 5 kJ/s. i) Draw the complete schematic of the device ii) Determine the thermal efficiency of the heat engine iii) Determine the coefficient of performance of the heat pump iv) Determine the rate of heat loss from the house. v) Determine the minimum rate of heat extraction by the heat pump, and vi) the total rate of heat rejection.
In Bilecik province, how many square meters should the surface area be minimum so that a planar type hot water collector with a 55% efficiency can produce water at a temperature of 50° Celsius in June, when the mains water temperature is 24°Celsius, which will be placed on the roof of a house with dark buildings around it according to summer practice?
5. A counter-flow bank of boiler tubes has a total area of 900 sq ft and its overall efficiency of heat transfer is 13 Btu/hr-ft2-degF. Calculate the heat transferred if the log mean temperature difference is 1380 deg F.

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